A．To sell and to inform.B．To increase prices and compet-找考题网

单项选择题

A．To sell and to inform.
B．To increase prices and competition.
C．To change the means of selling and buying.
D．To take away chances of choosing from customers.

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问答题

我们都清楚正常人每天的活动周期是大约 7～8小时的睡眠和16～17小时的清醒相互交替，我们也知道，一般来说，睡眠常在夜间进行。

单项选择题

A．Mother and son.B．Father and daughter.C．Teacher and student.D．Husband and wife.

A．Mother and son.
B．Father and daughter.
C．Teacher and student.
D．Husband and wife.

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